Aryan invasion theory

Topic: Harappan (Sindhu-Sarasvati) Civilisation · NCERT: Class 6, Ch 6 "The Beginnings of Indian Civilisation"; Class 12, Ch 1 "Bricks, Beads and Bones"

Meaning

The Aryan invasion theory was the idea, made famous by Mortimer Wheeler in 1947, that Aryan invaders attacked and destroyed the Harappan cities. Wheeler based it on skeletons found at Mohenjodaro and on Ṛig Vedic verses about the god Indra destroying forts. George F. Dales disproved the "massacre" in 1964. It matters because it is the classic example in Indian archaeology of a single-cause explanation being overturned when the evidence was checked again.

Explanation

Background: the skeletons and the Vedic verses

• 1925: John Marshall's excavation at Mohenjodaro found 16 skeletons in a place later called "Deadman Lane".
• The Ṛig Veda talks about pur (forts or walled places).
• It calls Indra puramdara, which means "fort-destroyer".
• 1947: Mortimer Wheeler joined these two clues together:
• he read the skeletons as people killed in a final attack;

• he read Indra, the Aryans' war god, as the leader of that attack.

• His famous line: "On circumstantial evidence, Indra stands accused." "Circumstantial" means the case rested on clues, not on direct proof.

What the theory claimed

• Harappan cities ended suddenly, not slowly.
• They ended through violence: outsiders attacked them.
• The attackers were the Aryans of the Ṛig Veda.
• So the decline had one cause, which was invasion.

How it was disproved

• 1964: George F. Dales published "The Mythical Massacre at Mohenjodaro" [4].
• His main points [4]:
• the skeletons belong to different time periods, so they did not all die in one attack;
• the burials were careless and without ceremony, which is not what battlefield dead look like;
• there is no destruction level, meaning no layer of ruin in the soil;
• there is no burnt city;
• there are no armoured warriors;

• there is no sign of a last fight to defend the citadel (the raised, walled part of the city).

• Dales also said the bodies were scattered across the site. They were not lying in the streets "where they were slain", as Wheeler had suggested [4].

• He suggested some bodies may come from later, unconnected deaths, for example attacks by hill bandits, and not from one violent event [4].

What replaced it

• No warfare at all: no army and no weapons of war have been found at Harappan sites. By the material record, it was a fairly peaceful civilisation.
• No single cause is accepted. Possible causes include climate change, deforestation, excessive floods, rivers shifting or drying up, and overuse of the land. Each one fits some sites, but none explains the whole collapse.
• Two factors are more widely accepted today:
• a climatic shift from c. 2200 BCE: less rain, a drier phase, and stress on farming;

• the drying of the Sarasvatī, which is linked to the abandonment of Kalibangan and Banawali.

• Outside scholars also say there is no single agreed cause. Ideas include a slow change in the monsoon, farming stress from more people using up resources, and sudden earth movements that changed the rivers feeding the Sarasvati/Ghaggar [2].

• Isotope and plant-remains studies show the monsoon weakening after c. 5,000 years ago. They also show farmers moving from wheat and barley to drought-resistant millets around 4,200 years ago [3].
• Result: decline is now seen as de-urbanisation (cities slowly giving way to villages), not a violent end. The cities ended, but the people did not.

Time, place and evidence

• Period: Harappan Civilisation, c. 3500–1300 BCE (mature phase 2600–1900 BCE). The decline comes after c. 1900 BCE.
• Main site: Mohenjodaro, specifically "Deadman Lane".
• Key people:
• John Marshall, whose 1925 excavation found the skeletons;
• Mortimer Wheeler, who put forward the invasion theory in 1947;

• George F. Dales, who refuted it in 1964.

• Evidence used for the theory: the 16 skeletons, plus Ṛig Vedic references to pur and to Indra as puramdara.

• Evidence against the theory:
• no burn or destruction layer and no weapons of war;
• skeletons from mixed time periods and careless burials [4];

• signs of climate stress and the drying of the Sarasvatī (Kalibangan, Banawali) [3].

• What happened to the people: by c. 1800 BCE, Cholistan (Hakra) sites were abandoned and people moved into Gujarat, Haryana and western UP.

• Signs of continuity: the plough, bangles worn up the full arm (still seen in Gujarat and Rajasthan), the 'namaste' figurine, games and toys, the thirsty-crow motif on a Lothal pot, and craft traditions that carried on.

Don't confuse with

• John Marshall vs Mortimer Wheeler: Marshall's excavation found the 16 skeletons in 1925. Wheeler interpreted them as invasion victims in 1947.
• Wheeler vs George Dales: Wheeler proposed the massacre ("Indra stands accused"). Dales demolished it in "The Mythical Massacre at Mohenjodaro" (1964).
• Invasion theory vs the climate/Sarasvatī-drying explanation: the invasion theory blames one sudden, violent cause. The view accepted today points to slow climate stress from c. 2200 BCE and the drying of the Sarasvatī, without warfare.
• End of the cities vs end of the people: the Harappan "package" disappeared (script, seals, standard weights, long-distance trade). The population and many of its customs carried on into later India.

Prelims Hooks

• 1925: Marshall's excavation finds 16 skeletons in "Deadman Lane", Mohenjodaro.
• 1947: Mortimer Wheeler links the Harappan decline to Ṛig Vedic Indra as puramdara ("fort-destroyer"): "On circumstantial evidence, Indra stands accused."
• 1964: George F. Dales, "The Mythical Massacre at Mohenjodaro", refutes the invasion theory.
• Correct order: Marshall finds the skeletons (1925) → Wheeler's invasion theory (1947) → Dales' refutation (1964).
• Dales' grounds: skeletons from different periods, careless burials, no destruction or burn layer, no armoured warriors, no defence of the citadel.
• Trap: no army and no weapons of war have been found at Harappan sites. Sites abandoned because the Sarasvatī dried up are Kalibangan and Banawali, not Mohenjodaro.

Mains Points

• The danger of one-cause explanations: the rejected Aryan invasion model blamed one sudden, violent cause. The view preferred today is slow climate and river stress (aridity after 2200 BCE, the Sarasvatī drying) leading to de-urbanisation. This is useful for GS-I answers on historical method.
• How history changes when evidence is rechecked: Wheeler (1947) → Dales (1964) is a clear case of re-examining the evidence and overturning what scholars had agreed on. It also shows the limits of combining literary sources (the Ṛig Veda) with archaeology that has not been checked closely.
• The state ended, the culture continued: the invasion theory suggested a clean break. The evidence shows the Harappan state system ended, while the people and their customs (the plough, bangles, the namaste posture, crafts) carried on. This supports the argument against a "clean break" view of Indian civilisation.

Related concepts

• Decline of the Harappan civilisation
• 4.2 kiloyear event
• Late Harappan phase
• Cemetery H culture
• Jhukar culture
• Sinauli
• Thirsty crow pot
• Mortimer Wheeler
• Mythical massacre at Mohenjo-daro

Read more

• Decline: end of the cities, not the people